20/22 coys with 4.5/6 drop? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lovnlifel&c · 09-24-2010, 10:11 AM

I am wanting to buy some coys for my mine and my wifes truck but I want to do 2.5 spindle with 2" springs front and 6" rear. what backspacing should I go with for front and rear and will I need to do any mods to anything or should it be straight forward? ill post some pics of the truck when I found out how to upload them lol.
thanks for all your help guys

72BlckButy · 09-24-2010, 06:24 PM

Welcome to the board from Mid-MO!

Check out my build thread (Project Blank Slate) in my signature for the complete install of a 4.5/6" drop kit, as well as determining the correct BS to run 20x8.5 and 20x10's on a '69 SWB.

One thing you didn't mention is what year of truck you are working on. From '67-mid 70's the rearends were narrower than the rearend of the '71 and '72 trucks due to the introduction of disc brakes from the factory. If you are working on a '67-70 remember that when adding disc brakes to the front, the front will have a wider track by 1.5" than it did with drums.

The only thing I can recommend is that for your to measure your truck for the specific backspacing for your 20/22 combo. Each truck is designed a little differently depending on the spindle used up front (CPP modular, standard drop spindle), rearend widths, etc.

Do NOT just take the measurements used by someone else... you will pay the price. Take them as guidance...

Give us some more info on your project.

Here's a shot of my '69 running the 4.5/6" drop kit:

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Name: 105_0041.jpg
Views: 360
Size: 54.7 KB

lovnlifel&c · 09-26-2010, 12:20 PM

sorry guess i should of put down more info,lol. its a 1972 chevrolet cheyenne long bed. I wish i had a short bed like yours 72 BLACKBUTY.

09-24-2010, 10:11 AM	#1
lovnlifel&c Registered User Join Date: Jul 2010 Location: wichita,ks Posts: 2	20/22 coys with 4.5/6 drop? I am wanting to buy some coys for my mine and my wifes truck but I want to do 2.5 spindle with 2" springs front and 6" rear. what backspacing should I go with for front and rear and will I need to do any mods to anything or should it be straight forward? ill post some pics of the truck when I found out how to upload them lol. thanks for all your help guys

09-24-2010, 06:24 PM	#2
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: 20/22 coys with 4.5/6 drop? Welcome to the board from Mid-MO! Check out my build thread (Project Blank Slate) in my signature for the complete install of a 4.5/6" drop kit, as well as determining the correct BS to run 20x8.5 and 20x10's on a '69 SWB. One thing you didn't mention is what year of truck you are working on. From '67-mid 70's the rearends were narrower than the rearend of the '71 and '72 trucks due to the introduction of disc brakes from the factory. If you are working on a '67-70 remember that when adding disc brakes to the front, the front will have a wider track by 1.5" than it did with drums. The only thing I can recommend is that for your to measure your truck for the specific backspacing for your 20/22 combo. Each truck is designed a little differently depending on the spindle used up front (CPP modular, standard drop spindle), rearend widths, etc. Do NOT just take the measurements used by someone else... you will pay the price. Take them as guidance... Give us some more info on your project. Here's a shot of my '69 running the 4.5/6" drop kit: __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

09-26-2010, 12:20 PM	#3
lovnlifel&c Registered User Join Date: Jul 2010 Location: wichita,ks Posts: 2	Re: 20/22 coys with 4.5/6 drop? sorry guess i should of put down more info,lol. its a 1972 chevrolet cheyenne long bed. I wish i had a short bed like yours 72 BLACKBUTY.



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